Muhyiuddin
It is a title historically given to great scholars and saints who revived Islamic thought, most notably Sheikh Abdul Qadir Gilani.
The specific compound is not in the Quran, but the root 'Muhyi' (The Giver of Life) is one of the 99 Names of Allah mentioned in Surah Ar-Rum.
It is considered a classical and rare name in modern times, primarily used in traditional or scholarly families.
It implies a person who is a leader, a reformer, and someone deeply committed to spiritual and religious growth.
Yes, common nicknames include Muhyi or Deen.